Humans have practiced some form of yodeling since at least the 13th century, when Marco Polo encountered Tibetan monks on his travels who used the vocal technique for long-distance communication. It's since morphed into a distinctive singing style. But can animals also yodel? According to a new paper published in the Philosophical Transactions of the Royal Society B, Biological Sciences, several species of monkey dwelling in the rainforests of Latin America employ "voice breaks" in their calls that acoustically resemble human yodeling—i.e., "ultra-yodels" that boast a much wider frequency range.

Many years ago, I wrote about the bioacoustics of human yodeling for New Scientist. In many respects, yodeling is quite simple. It merely involves singing a long note subjected to repeated rapid sharp shifts in pitch. It's the unique anatomy of the human vocal tract that makes it possible, notably the larynx (voice box) located just behind the Adam's apple. The larynx is comprised of cartilage and the hyoid bone that together support the vocal cords, which are attached to muscles on either side of the larynx.

When air flows through the trachea, the vocal cords vibrate at frequencies ranging from 110 to 200 Hz. We have the capability of contracting the muscles to change the shape, position, and tension of our vocal cords, thereby altering the pitch of the sound produced. Stiffer vocal cords result in faster vibrations, which produce higher pitches.

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Critics are questioning if Donald Trump's administration possibly used chatbots to calculate reciprocal tariffs announced yesterday that Trump claimed were "individualized" tariffs placed on countries that have " the largest trade deficits" with the US.

Those tariffs are due to take effect on April 9 for 60 countries, with peak rates around 50 percent. That's in addition to a baseline 10 percent tariff that all countries will be subject to starting on April 5. But while Trump expressed intent to push back on anyone supposedly taking advantage of the US, some of the countries on the reciprocal tariffs list puzzled experts and officials, who pointed out to The Guardian that Trump was, for some reason, targeting uninhabited islands, some of them exporting nothing and populated with penguins.

Some overseas officials challenged Trump's math, such as George Plant, the administrator of Norfolk Island, who told the Guardian that "there are no known exports from Norfolk Island to the United States and no tariffs or known non-tariff trade barriers on goods coming to Norfolk Island."

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SpaceX is having trouble with Starship's upper stage after back-to-back failures, but engineers are making remarkable progress with the rocket's enormous booster.

The most visible sign of SpaceX making headway with Starship's first stage—called Super Heavy—came at 9:40 am local time (10:40 am EDT; 14:40 UTC) Thursday at the company's Starbase launch site in South Texas. With an unmistakable blast of orange exhaust, SpaceX fired up a Super Heavy booster that has already flown to the edge of space. The burn lasted approximately eight seconds.

This was the first time SpaceX has test-fired a "flight-proven" Super Heavy booster, and it could pave the way for this particular rocket—designated Booster 14—to fly again soon. A reflight of Booster 14, which previously launched and returned to Earth in January, could happen as soon as the next Starship launch. With Thursday's static fire test, Booster 14 appears to be closer to flight readiness than any of the boosters in SpaceX's factory, which is a short distance from the launch site.

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Most of Google's AI efforts thus far have involved adding generative features to existing products, but NotebookLM is different. Created by the Google Labs team, NotebookLM uses AI to analyze user-provided documents. Starting today, it will be even easier to use NotebookLM to explore topics, as Google has added a "Discover Sources" feature to let the app look up its own sources.

Previously, to create a new notebook, you had to feed the AI documents, web links, YouTube videos, or raw text. You can still do that, but you don't have to with the addition of Discover functionality. Simply click the new button and tell NotebookLM what you're interested in learning. Google says the app will consider "hundreds of potential web sources" in the blink of an eye, giving you the top 10 from which to choose. There will be links available so you can peruse the suggestions before adding them to the model.

The sources you select will be ingested as if they were documents you uploaded, creating a conversant AI for your chosen topic. The content of those sources will also be loaded into NotebookLM so you can refer to them directly. That's not why you use NotebookLM, though. You use NotebookLM for all the nifty AI-assisted features.

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New 25 percent tariffs on all foreign car imports into the United States went into effect this week as President Trump ignited his new trade war. It has caused something of a rush at dealerships around the country as customers descend on existing stock in an attempt to beat looming price increases of thousands of dollars. Now we're starting to see how the automakers are reacting.

Employee pricing for all

Ford is in the rather enviable position of having the least exposure to the new vehicle tariff than all but Tesla; less than 20 percent of the cars, trucks, and SUVs that Ford sells in the US are imported from abroad. And it will lean into that with a new ad campaign with the slogan "From America, For America," which launches today. (Note that this does not take into account the separate parts tariff that goes into effect before May 2.)

Never mind the slogan, though. The campaign extends Ford's "A plan" pricing, which in plain English is its employee discount, to all its customers. The blue oval is offering A plan pricing on most 2024 and 2025 vehicles, including the all-electric F-150 Lightning and the Mustang Mach-E, as well as its various hybrids.

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US experts who work in artificial intelligence fields seem to have a much rosier outlook on AI than the rest of us.

In a survey comparing views of a nationally representative sample (5,410) of the general public to a sample of 1,013 AI experts, the Pew Research Center found that "experts are far more positive and enthusiastic about AI than the public" and "far more likely than Americans overall to believe AI will have a very or somewhat positive impact on the United States over the next 20 years" (56 percent vs. 17 percent). And perhaps most glaringly, 76 percent of experts believe these technologies will benefit them personally rather than harm them (15 percent).

The public does not share this confidence. Only about 11 percent of the public says that "they are more excited than concerned about the increased use of AI in daily life." They're much more likely (51 percent) to say they're more concerned than excited, whereas only 15 percent of experts shared that pessimism. Unlike the majority of experts, just 24 percent of the public thinks AI will be good for them, whereas nearly half the public anticipates they will be personally harmed by AI.

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A study released on Wednesday finds that a live-virus vaccine that limits shingles symptoms was associated with a drop in the risk for dementia when it was introduced. The work took advantage of the fact that the National Health Service Wales made the vaccine available with a very specific age limit, essentially creating two populations, vaccinated and unvaccinated, separated by a single date. And these populations showed a sharp divide in how often they were diagnosed with dementia, despite having little in the way of other differences in health issues or treatments.

What a day

This study didn't come out of nowhere. There have been a number of hints recently that members of the herpesvirus family that can infect nerve cells are associated with dementia. That group includes Varicella zoster, the virus that causes both chicken pox and—potentially many years after— shingles, an extremely painful rash. And over the past couple of years, observational studies have suggested that the vaccine against shingles may have a protective effect.

But it's extremely difficult to do a clinical trial given that the onset of dementia may happen decades after most people first receive the shingles vaccine. That's why the use of NHS Wales data was critical. When the first attenuated virus vaccine for shingles became available, it was offered to a subset of the Welsh population. Those who were born on or after September 2, 1933, were eligible to receive the vaccine. Anyone older than that was permanently ineligible.

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Among the changes mentioned in yesterday's Nintendo Switch 2 presentation was a note that the new console doesn't just support MicroSD Express cards for augmenting the device's 256GB of internal storage, but it requires MicroSD Express. Whatever plentiful, cheap microSD card you're using in your current Switch, including Sandisk's Nintendo-branded ones, can't migrate over to your Switch 2 alongside all your Switch 1 games.

MicroSD Express, explained

Why is regular-old MicroSD no longer good enough? It all comes down to speed.

Most run-of-the-mill SD and microSD cards you can buy today are using some version of the Ultra High Speed (UHS) standard. Designed to augment the default speed (12.5MB/s) and high speed (25MB/s) from the earliest versions of the SD card standard, the three UHS versions enable data transfers of up to 624MB/s.

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Samsung has turned to Chinese technology groups to prop up its ailing semiconductor division, as it struggles to secure big US customers despite investing tens of billions of dollars in its American manufacturing facilities.

The South Korean electronics group revealed last month that the value of its exports to China jumped 54 percent between 2023 and 2024, as Chinese companies rush to secure stockpiles of advanced artificial intelligence chips in the face of increasingly restrictive US export controls.

In one previously unreported deal, Samsung last year sold more than three years’ supply of logic dies—a key component in manufacturing AI chips—to Kunlun, the semiconductor design subsidiary of Chinese tech group Baidu, according to people familiar with the matter.

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The Nintendo Switch 2 could be considered the most direct "sequel" to a Nintendo console that the company has ever made. The lineage is right there in the name, with Nintendo simply appending the number "2" onto the name of its incredibly successful previous console for the first time in its history.

Nintendo's previous consoles have all differed from their predecessors in novel ways that were reflected in somewhat new naming conventions. The Switch 2's name, on the other hand, suggests that it is content to primarily be "more Switch." And after spending the better part of the day playing around with the Switch 2 hardware and checking out some short game demos on Wednesday, I indeed came away with the impression that this console is "more Switch" in pretty much every way that matters, for better or worse.

Bigger is better

We've deduced from previous trailers just how much bigger the Switch 2 would be than the original Switch. Even with that preparation, though, the expanded Switch 2 makes a very good first impression in person.

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Last week, Health Secretary and anti-vaccine advocate Robert F. Kennedy Jr. announced the Trump administration would hack off nearly a quarter of employees at the Department of Health and Human Services, which oversees critical agencies including the Food and Drug Administration (FDA), the Centers for Disease Control and Prevention (CDC), the National Institutes of Health (NIH), and the Centers for Medicare and Medicaid Services (CMS).

The downsizing includes pushing out about 10,000 full-time employees through early retirements, deferred resignations, and other efforts. Another 10,000 will be laid off in a brutal restructuring, bringing the total HHS workforce from 82,000 to 62,000.

"This will be a painful period," Kennedy said in a video announcement last week. Early yesterday morning, the pain began.

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Paramount+ has dropped a tantalizing one-minute teaser for the upcoming third season of Star Trek: Strange New Worlds., and it looks like the latest adventures of the starship Enterprise will bring romance, comedy, mystery, and even a bit of analog tech, not to mention a brand new villain.

(Some spoilers for S2 below)

We haven't seen much from the third season to date. There was an exclusive clip during San Diego Comic Con last summer—a callback to the S2 episode "Charades," in which a higher-dimensional race, the Kerkohvians, accidentally reconfigured Spock's half-human, half-Vulcan physiology to that of a full-blooded human, just before Spock was supposed to meet his Vulcan fiancee's parents. The S3 clip had the situation reversed: The human crew had to make themselves Vulcan to succeed on a new mission but weren't able to change back.

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Fruit flies (Drosophila melanogaster) are tremendously fond of fermented foodstuffs. Technically, it's the yeast they crave, produced by yummy rotting fruit, but they can consume quite a lot of ethanol as a result of that fruity diet. Yes, fruit flies have ultra-fast metabolisms, the better to burn off the booze, but they can still get falling-down drunk—so much so, that randy inebriated male fruit flies have been known to court other males by mistake and fail to mate successfully.

Then again, apparently adding alcohol to their food increases the production of sex pheromones in male fruit flies, according to a new paper published in the journal Science Advances. That, in turn, makes them more attractive to the females of the species.

"We show a direct and positive effect of alcohol consumption on the mating success of male flies," said co-author Ian Keesey of the University of Nebraska, Lincoln. "The effect is caused by the fact that alcohol, especially methanol, increases the production of sex pheromones. This in turn makes alcoholic males more attractive to females and ensures a higher mating success rate, whereas the success of drunken male humans with females is likely to be questionable."

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On the heels of releasing its most capable AI model yet, Google is making some changes to the Gemini team. A new report from Semafor reveals that longtime Googler Sissie Hsiao will step down from her role leading the Gemini team effective immediately. In her place, Google is appointing Josh Woodward, who currently leads Google Labs.

According to a memo from DeepMind CEO Demis Hassabis, this change is designed to "sharpen our focus on the next evolution of the Gemini app." This new responsibility won't take Woodward away from his role at Google Labs—he will remain in charge of that division while leading the Gemini team.

Meanwhile, Hsiao says in a message to employees that she is happy with "Chapter 1" of the Bard story and is optimistic for Woodward's "Chapter 2." Hsiao won't be involved in Google's AI efforts for now—she's opted to take some time off before returning to Google in a new role.

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Nintendo's Switch 2 presentation gave us pricing for the console ($449 to start) and Nintendo's product pages have given us pricing information for accessories ($80 for a Pro Controller, $90 for another pair of Joy-Cons, and $110 for a replacement dock, sheesh). But what Nintendo didn't mention during the presentation was game pricing, either for standalone Switch 2 titles or the Switch 2 Edition upgrades for existing Switch games.

Nintendo announced via its website after the presentation that Mario Kart World, the console's flagship launch title, will cost $50 when you buy a digital copy as part of a Switch 2 bundle. But the game will cost $80 when you buy it on its own, $30 more than the pack-in version and $20 more than the usual $60 price for first-party Switch games.

Pre-order listings at US retailers that have gone live since this morning also list several $80 games—we'll use Wal-Mart's as an example. The upgraded Switch 2 Editions for a trio of Switch games—2024's Super Mario Party Jamboree, 2023's The Legend of Zelda: Tears of the Kingdom, and 2022's Kirby and the Forgotten Land—are all going for $80, the same as Mario Kart World.

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I don't think anybody outside Nintendo or FromSoftware was expecting a spiritual successor to Bloodborne to be one of the titles announced at the Nintendo Switch 2's launch today. Not just "playable" on the Switch 2, but exclusive to it. But there it was, The Duskbloods, debuting its dread horror action just a few minutes before the luminously pink and puffy Kirby Air Ride 2. 

The Switch 2's launch titles, and other announced games, are quite the rich stew. Here are some of the AAA ports, exclusives, and unexpectedly gruesome games arriving on the just-announced system.

Switch exclusives, including Nintendo’s own

Riding it like he stole it (in 2003). Credit: Nintendo

We'll get to FromSoftware's surprising Switch 2 exclusive in a bit. Far less surprising is a new Mario Kart game, as Mario Kart 8 sold more than 67 million copies, covering more than 40 percent of all Switches sold. Mario Kart World goes big, with 24 simultaneous players, and the ability to explore off the course in a kind of open-world setting.

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Europol has shut down one of the largest dark web pedophile networks in the world, prompting dozens of arrests worldwide and threatening that more are to follow.

Launched in 2021, KidFlix allowed users to join for free to preview low-quality videos depicting child sex abuse materials (CSAM). To see higher-resolution videos, users had to earn credits by sending cryptocurrency payments, uploading CSAM, or "verifying video titles and descriptions and assigning categories to videos."

Europol seized the servers and found a total of 91,000 unique videos depicting child abuse, "many of which were previously unknown to law enforcement," the agency said in a press release.

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National Security Advisor Michael Waltz and a senior aide used personal Gmail accounts for government communications, according to a Washington Post report published yesterday.

Waltz has been at the center of controversy for weeks because he inadvertently invited The Atlantic Editor-in-Chief Jeffrey Goldberg to a Signal chat in which top Trump administration officials discussed a plan for bombing Houthi targets in Yemen. Yesterday's report of Gmail use and another recent report on additional Signal chats raise more questions about the security of sensitive government communications in the Trump administration.

A senior Waltz aide used Gmail "for highly technical conversations with colleagues at other government agencies involving sensitive military positions and powerful weapons systems relating to an ongoing conflict," The Washington Post wrote.

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On Tuesday, the Wikimedia Foundation announced that relentless AI scraping is putting strain on Wikipedia's servers. Automated bots seeking AI model training data for LLMs have been vacuuming up terabytes of data, growing the foundation's bandwidth used for downloading multimedia content by 50 percent since January 2024. It’s a scenario familiar across the free and open source software (FOSS) community, as we've previously detailed.

The Foundation hosts not only Wikipedia but also platforms like Wikimedia Commons, which offers 144 million media files under open licenses. For decades, this content has powered everything from search results to school projects. But since early 2024, AI companies have dramatically increased automated scraping through direct crawling, APIs, and bulk downloads to feed their hungry AI models. This exponential growth in non-human traffic has imposed steep technical and financial costs—often without the attribution that helps sustain Wikimedia’s volunteer ecosystem.

The impact isn’t theoretical. The foundation says that when former US President Jimmy Carter died in December 2024, his Wikipedia page predictably drew millions of views. But the real stress came when users simultaneously streamed a 1.5-hour video of a 1980 debate from Wikimedia Commons. The surge doubled Wikimedia’s normal network traffic, temporarily maxing out several of its Internet connections. Wikimedia engineers quickly rerouted traffic to reduce congestion, but the event revealed a deeper problem: The baseline bandwidth had already been consumed largely by bots scraping media at scale.

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A SpaceX and X engineer, Christopher Stanley—currently serving as a senior advisor in the Deputy Attorney General's office at the Department of Justice (DOJ)—was reportedly caught bragging about hacking and distributing pirated e-books, bootleg software, and game cheats.

The boasts appeared on archived versions of websites, of which several, once flagged, were quickly deleted, Reuters reported.

Stanley was assigned to the DOJ by Elon Musk's Department of Government Efficiency (DOGE). While Musk claims that DOGE operates transparently, not much is known about who the staffers are or what their government roles entail. It remains unclear what Stanley does at DOJ, but Reuters noted that the Deputy Attorney General’s office is in charge of investigations into various crimes, "including hacking and other malicious cyber activity." Declining to comment further, the DOJ did confirm that as a "special government employee," like Musk, Stanley does not draw a government salary.

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